Primes of the form k^4 + 1.

Terms

a(0) =2a(1) =17a(2) =257a(3) =1297a(4) =65537a(5) =160001a(6) =331777a(7) =614657a(8) =1336337a(9) =4477457a(10) =5308417a(11) =8503057a(12) =9834497a(13) =29986577a(14) =40960001a(15) =45212177a(16) =59969537a(17) =65610001a(18) =126247697a(19) =193877777a(20) =303595777a(21) =384160001a(22) =406586897a(23) =562448657a(24) =655360001a(25) =723394817a(26) =916636177a(27) =1049760001a(28) =1416468497